I have an unopened can of IMR4227 that is in a steel can. It was sold to a friend when he asked for Black Powder. Go figure. I also have part cans of both H and IMR 4227 from 40 or more years ago.
Although some old books give data for 4227 and the .45/70, but that is not a powder I would use even for light loads. My bro has a light load he likes for cowboy action challenges using his 86 Winchester. 31gr. 4198 & 420gr. cast bullet. Soft shooting and very accurate.